OPTICAL ZOOM DEVICE

1 . Optical zoom device ( 1 ), comprising:

a first lens ( 31 ) having an adjustable focal length and comprising a container ( 41 ) filled with a transparent fluid (F), wherein the container ( 41 ) of the first lens ( 31 ) comprises an elastically deformable and transparent membrane ( 61 ) facing a transparent wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ),

a second lens ( 32 ) having an adjustable focal length, wherein the second lens ( 32 ) is arranged after the first lens ( 31 ) in an optical path (A) of the optical zoom device ( 1 ), wherein the second lens ( 32 ) comprises a container ( 42 ) filled with a transparent fluid (F′), wherein the container ( 42 ) of the second lens ( 32 ) comprises an elastically deformable and transparent membrane ( 62 ) facing a transparent wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ), and

a light deflecting device ( 70 ) arranged in the optical path (A), wherein the second lens ( 32 ) is arranged after the light deflecting device ( 70 ) in the optical path (A).

2 . Optical zoom device according to claim 1 , characterized in that the first lens ( 31 ) is arranged in front of the light deflecting device ( 70 ) or after the light deflecting device ( 70 ) in the optical path (A).

3 . Optical zoom device according to claim 1 , characterized in that the optical zoom device ( 1 ) comprises a third lens ( 33 ) having an adjustable focal length, the third lens ( 33 ) comprising a container ( 43 ) filled with a transparent fluid (F″), wherein the container ( 43 ) of the third lens ( 33 ) comprises an elastically deformable and transparent membrane ( 63 ) facing a transparent wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ).

4 . Optical zoom device according to claim 3 , characterized in that the third lens ( 33 ) is arranged after the light deflecting device ( 70 ) in the optical path (A).

5 . Optical zoom device according to claim 3 , characterized in that the third lens ( 33 ) is arranged after the second lens ( 32 ) in the optical path (A).

6 . Optical zoom device according to claim 1 , characterized in that the optical zoom device ( 1 ) comprises an aperture stop ( 80 ) arranged in the optical path (A).

7 . Optical zoom device according to claim 6 , characterized in that the aperture stop ( 80 ) is arranged after the light deflecting device ( 70 ) in the optical path (A).

8 . Optical zoom device according to claim 6 , characterized in that the aperture stop ( 80 ) is arranged between the first lens ( 31 ) and the second lens ( 32 ) in the optical path (A).

9 . Optical zoom device according to claim 3 , characterized in that the aperture stop ( 80 ) is arranged between the second lens ( 32 ) and the third lens ( 33 ) in the optical path (A).

10 . Optical zoom device according to claim 1 , characterized in that the optical zoom device ( 1 ) comprises a rigid lens ( 90 ) arranged in front of the light deflecting device ( 70 ) in the optical path (A).

11 . Optical zoom device according to claim 1 , characterized in that the optical zoom device ( 1 ) comprises at least one rigid lens ( 91 ) arranged after the light deflecting device ( 70 ) and/or after first lens ( 31 ) in the optical path (A).

12 . Optical zoom device according to claim 1 , characterized in that the optical zoom device ( 1 ) comprises an image sensor ( 100 ) arranged after the second lens ( 32 ) or after the third lens ( 33 ) in the optical path (A).

13 . Optical zoom device according to claim 1 , characterized in that for adjusting the focal length of the first lens ( 31 ), the membrane ( 61 ) of the first lens ( 31 ) is connected to a circumferential lens shaping element ( 71 ) of the first lens ( 31 ) for defining an area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) having an adjustable curvature; and/or wherein for adjusting the focal length of the second lens ( 32 ), the membrane ( 62 ) of the second lens ( 32 ) is connected to a circumferential lens shaping element ( 72 ) of the second lens ( 32 ) for defining an area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) having an adjustable curvature; and/or wherein for adjusting the focal length of the third lens ( 33 ), the membrane ( 63 ) of the third lens ( 33 ) is connected to a circumferential lens shaping element ( 73 ) of the third lens ( 33 ) for defining an area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) having an adjustable curvature.

14 . Optical zoom device according to claim 1 , characterized in that the container ( 41 ) of the first lens ( 31 ) encloses a lens volume (V 1 ) filled with the fluid (F) and at least a first reservoir volume (R 1 ) filled with the fluid (F) and connected to the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ), wherein the container ( 41 ) of the first lens ( 31 ) comprises an elastically deformable first wall member ( 41 a ) adjacent the at least one first reservoir volume (R 1 ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the container ( 42 ) of the second lens ( 32 ) encloses a lens volume (V 2 ) filled with the fluid (F′) and at least a first reservoir volume (R 2 ) filled with the fluid (F′) and connected to the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ), wherein the container ( 42 ) of the second lens ( 32 ) comprises an elastically deformable first wall member ( 42 a ) adjacent the at least one first reservoir volume (R 2 ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the container ( 43 ) of the third lens ( 33 ) encloses a lens volume (V 3 ) filled with the fluid (F″) and at least a first reservoir volume (R 3 ) filled with the fluid (F″) and connected to the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ), wherein the container ( 43 ) of the third lens ( 33 ) comprises an elastically deformable first wall member ( 43 a ) adjacent the at least one first reservoir volume (R 3 ) of the container ( 43 ) of the third lens ( 33 ).

15 . Optical zoom device according to claim 14 , characterized in that the elastically deformable first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ) is formed by the membrane ( 61 ) of the first lens ( 31 ); and/or wherein the elastically deformable first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ) is formed by the membrane ( 62 ) of the second lens ( 32 ); and/or wherein the elastically deformable first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ) is formed by the membrane ( 63 ) of the third lens ( 33 ).

16 . Optical zoom device according to claim 14 , characterized in that the at least one first reservoir volume (R 1 ) of the container ( 41 ) of the first lens ( 31 ) is arranged laterally next to the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ) in a direction perpendicular to the optical axis of the first lens ( 31 ); and/or wherein the at least one first reservoir volume (R 2 ) of the container ( 42 ) of the second lens ( 32 ) is arranged laterally next to the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ) in a direction perpendicular to the optical axis of the second lens ( 32 ); and/or wherein the at least one first reservoir volume (R 3 ) of the container ( 43 ) of the third lens ( 33 ) is arranged laterally next to the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ) in a direction perpendicular to the optical axis of the third lens ( 33 ).

17 . Optical zoom device according to claim 14 , characterized in that that the container ( 41 ) of the first lens ( 31 ) encloses a second reservoir volume (R 12 ) connected to the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ), wherein the container ( 41 ) of the first lens ( 31 ) comprises an elastically deformable second wall member ( 41 b ) adjacent the second reservoir volume (R 12 ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the container ( 42 ) of the second lens ( 32 ) encloses a second reservoir volume (R 22 ) connected to the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ), wherein the container ( 42 ) of the second lens ( 32 ) comprises an elastically deformable second wall member ( 42 b ) adjacent the second reservoir volume (R 22 ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the container ( 43 ) of the third lens ( 33 ) encloses a second reservoir volume (R 32 ) connected to the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ), wherein the container ( 43 ) of the third lens ( 33 ) comprises an elastically deformable second wall member ( 43 b ) adjacent the second reservoir volume (R 32 ) of the container ( 43 ) of the third lens ( 33 ).

18 . Optical zoom device according to claim 1 , characterized in that the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ) comprises a step ( 301 ), particularly for increasing the at least one first reservoir volume (R 1 ) of the first lens ( 31 ); and/or wherein the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ) comprises a step ( 302 ), particularly for increasing the at least one first reservoir volume (R 2 ) of the second lens ( 32 ); and/or wherein the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ) comprises a step ( 303 ), particularly for increasing the at least one first reservoir volume (R 3 ) of the third lens ( 33 ).

19 . Optical zoom device according to claim 17 , characterized in that the first and the second reservoir volume (R 1 , R 12 ) of the container ( 41 ) of the first lens ( 31 ) face each other in a direction perpendicular to the optical axis of the first lens ( 31 ), and are arranged on the same side of the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ) or are arranged on opposite sides of the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the first and the second reservoir volume (R 2 , R 22 ) of the container ( 42 ) of the second lens ( 32 ) face each other in a direction perpendicular to the optical axis of the second lens ( 32 ), and are arranged on the same side of the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ) or are arranged on opposite sides of the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the first and the second reservoir volume (R 3 , R 32 ) of the container ( 43 ) of the third lens ( 33 ) face each other in a direction perpendicular to the optical axis of the third lens ( 33 ), and are arranged on the same side of the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ) or are arranged on opposite sides of the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ).

20 . Optical zoom device according to claim 14 , characterized in that the container ( 41 ) of the first lens ( 31 ) comprises a frame structure ( 51 ) forming a lateral wall of the container ( 41 ) of the first lens ( 31 ), wherein the frame structure ( 51 ) of the container ( 41 ) of the first lens ( 31 ) comprises a first recess ( 51 a ) forming the lens volume (V 1 ) of the container ( 41 ) of the first lens ( 31 ) that is covered by the membrane ( 61 ) of the container ( 41 ) of the first lens ( 31 ) and particularly by the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ), and wherein the frame structure ( 51 ) of the container ( 41 ) of the first lens ( 31 ) comprises a second recess ( 51 b ) forming the at least one first reservoir volume (R 1 ) of the container ( 41 ) of the first lens ( 31 ) that is covered by the first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ) and particularly by the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the container ( 42 ) of the second lens ( 32 ) comprises a frame structure ( 52 ) forming a lateral wall of the container ( 42 ) of the second lens ( 32 ), wherein the frame structure ( 52 ) of the container ( 42 ) of the second lens ( 32 ) comprises a first recess ( 52 a ) forming the lens volume (V 2 ) of the container ( 42 ) of the second lens ( 32 ) that is covered by the membrane ( 62 ) of the container ( 42 ) of the second lens ( 32 ) and particularly by the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ), and wherein the frame structure ( 52 ) of the container ( 42 ) of the second lens ( 32 ) comprises a second recess ( 52 b ) forming the at least one first reservoir volume (R 2 ) of the container ( 42 ) of the second lens ( 32 ) that is covered by the first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ) and particularly by the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the container ( 43 ) of the third lens ( 33 ) comprises a frame structure ( 53 ) forming a lateral wall of the container ( 43 ) of the third lens ( 33 ), wherein the frame structure ( 53 ) of the container ( 43 ) of the third lens ( 33 ) comprises a first recess ( 53 a ) forming the lens volume (V 3 ) of the container ( 43 ) of the third lens ( 33 ) that is covered by the membrane ( 63 ) of the container ( 43 ) of the third lens ( 33 ) and particularly by the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ), and wherein the frame structure ( 53 ) of the container ( 43 ) of the third lens ( 33 ) comprises a second recess ( 53 b ) forming the at least one first reservoir volume (R 3 ) of the container ( 43 ) of the third lens ( 33 ) that is covered by the first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ) and particularly by the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ).

21 . Optical zoom device according to claim 20 , characterized in that the frame structure ( 51 ) of the container ( 41 ) of the first lens ( 31 ) comprises a third recess ( 51 c ) forming the second reservoir volume (R 12 ) of the container ( 41 ) of the first lens ( 31 ) that is covered by the second wall member ( 41 b ) of the container ( 41 ) of the first lens ( 31 ) and particularly by the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the frame structure ( 52 ) of the container ( 42 ) of the second lens ( 32 ) comprises a third recess ( 51 c ) forming the second reservoir volume (R 22 ) of the container ( 42 ) of the second lens ( 32 ) that is covered by the second wall member ( 42 b ) of the container ( 42 ) of the second lens ( 32 ) and particularly by the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the frame structure ( 53 ) of the container ( 43 ) of the third lens ( 33 ) comprises a third recess ( 51 c ) forming the second reservoir volume (R 32 ) of the container ( 43 ) of the third lens ( 33 ) that is covered by the second wall member ( 43 b ) of the container ( 43 ) of the third lens ( 33 ) and particularly by the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ).

22 . Optical zoom device according to claim 21 , characterized in that the first recess ( 51 a ) of the frame structure ( 51 ) of the first lens ( 31 ) comprises a circumferential edge ( 71 ) which forms the lens shaping element ( 71 ) of the first lens ( 31 ); and/or wherein the first recess ( 52 a ) of the frame structure ( 52 ) of the second lens ( 32 ) comprises a circumferential edge ( 72 ) which forms the lens shaping element ( 72 ) of the second lens ( 32 ); and/or wherein the first recess ( 53 a ) of the frame structure ( 53 ) of the third lens ( 33 ) comprises a circumferential edge ( 73 ) which forms the lens shaping element ( 73 ) of the third lens ( 33 ).

23 . Optical zoom device according to claim 1 , characterized in that the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ) is an elastically deformable and transparent further membrane ( 21 ); and/or wherein the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ) is an elastically deformable and transparent further membrane ( 22 ); and/or wherein the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ) is an elastically deformable and transparent further membrane ( 23 ).

24 . Optical zoom device according to claim 23 , characterized in that the further membrane ( 21 ) of the first lens ( 31 ) is connected to a circumferential further lens shaping element ( 171 ) of the first lens ( 31 ) for defining an area ( 61 b ) of the further membrane ( 21 ) of the first lens ( 31 ) having an adjustable curvature; and/or wherein the further membrane ( 22 ) of the second lens ( 32 ) is connected to a circumferential further lens shaping element ( 172 ) of the second lens ( 32 ) for defining an area ( 62 b ) of the further membrane ( 22 ) of the second lens ( 32 ) having an adjustable curvature; and/or wherein the further membrane ( 23 ) of the third lens ( 33 ) is connected to a circumferential further lens shaping element ( 173 ) of the third lens ( 33 ) for defining an area ( 63 b ) of the further membrane ( 23 ) of the third lens ( 33 ) having an adjustable curvature.

25 . Optical zoom device according to claim 24 , characterized in that the first recess ( 51 a ) of the frame structure ( 51 ) of the first lens ( 31 ) comprises a further circumferential edge ( 171 ) which forms the further lens shaping element ( 171 ) of the first lens ( 31 ); and/or wherein the first recess ( 52 a ) of the frame structure ( 52 ) of the second lens ( 32 ) comprises a further circumferential edge ( 172 ) which forms the further lens shaping element ( 172 ) of the second lens ( 32 ); and/or wherein the first recess ( 53 a ) of the frame structure ( 53 ) of the third lens ( 33 ) comprises a further circumferential edge ( 173 ) which forms the further lens shaping element ( 173 ) of the third lens ( 33 ).

26 . Optical zoom device according to claim 14 , characterized in that, the lens volume (V 1 ) of the first lens ( 31 ) is separated by a transparent separation wall ( 75 ) into a first lens volume part (V 11 ) and a second lens volume part (V 12 ), wherein the first lens volume part (V 11 ) of the first lens ( 31 ) is connected to the first reservoir volume (R 1 ) of the first lens ( 31 ) and the second lens volume part (V 12 ) of the first lens ( 31 ) is connected to the second reservoir volume (R 12 ) of the first lens ( 31 ); and/or wherein the lens volume (V 2 ) of the second lens ( 32 ) is separated by a transparent separation wall ( 76 ) into a first lens volume part (V 21 ) and second lens volume part (V 22 ), wherein the first lens volume part (V 21 ) of the second lens ( 32 ) is connected to the first reservoir volume (R 2 ) of the second lens ( 32 ) and the second lens volume part (V 22 ) of the second lens ( 31 ) is connected to the second reservoir volume (R 22 ) of the second lens ( 32 ); and/or wherein the lens volume (V 3 ) of the third lens ( 33 ) is separated by a transparent separation wall ( 77 ) into a first lens volume part (V 31 ) and second lens volume part (V 32 ), wherein the first lens volume part (V 31 ) of the third lens ( 33 ) is connected to the first reservoir volume (R 3 ) of the third lens ( 33 ) and the second lens volume part (V 32 ) of the third lens ( 33 ) is connected to the second reservoir volume (R 32 ) of the third lens ( 33 ).

27 . Optical zoom device according to claim 14 , characterized in that the first lens ( 31 ) comprises an actuator ( 111 ) that is configured to act on the elastically deformable first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ) to pump fluid (F) from the at least one first reservoir volume (R 1 ) of the first lens ( 31 ) into the lens volume (V 1 ) of the first lens ( 31 ) or from the lens volume (V 1 ) of the first lens ( 31 ) into the at least one first reservoir volume (R 1 ) of the first lens ( 31 ) so as to change the curvature of said area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ); and/or wherein the second lens ( 32 ) comprises an actuator ( 112 ) that is configured to act on the elastically deformable first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ) to pump fluid (F′) from the at least one first reservoir volume (R 2 ) of the second lens ( 32 ) into the lens volume (V 2 ) of the second lens ( 32 ) or from the lens volume (V 2 ) of the second lens ( 32 ) into the at least one first reservoir volume (R 2 ) of the second lens ( 32 ) so as to change the curvature of said area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ); and/or wherein the third lens ( 33 ) comprises an actuator ( 113 ) that is configured to act on the elastically deformable first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ) to pump fluid (F″) from the at least one first reservoir volume (R 3 ) of the third lens ( 33 ) into the lens volume (V 3 ) of the third lens ( 33 ) or from the lens volume (V 3 ) of the third lens ( 33 ) into the at least one first reservoir volume (R 3 ) of the third lens ( 33 ) so as to change the curvature of said area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) and therewith the focal length of the third lens ( 33 ).

28 . Optical zoom device according to claim 14 , characterized in that the actuator ( 111 ) of the first lens ( 31 ) is further configured to act on the elastically deformable second wall member ( 41 b ) of the container ( 41 ) of the first lens ( 31 ) to pump fluid (F) from the second reservoir volume (R 12 ) of the first lens ( 31 ) into the lens volume (V 1 ) of the first lens ( 31 ) or from the lens volume (V 1 ) of the first lens ( 31 ) into the second reservoir volume (R 12 ) of the first lens ( 31 ) so as to change the curvature of said area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ); and/or wherein the actuator ( 112 ) of the second lens ( 32 ) is further configured to act on the elastically deformable second wall member ( 42 b ) of the container ( 42 ) of the second lens ( 32 ) to pump fluid (F′) from the second reservoir volume (R 22 ) of the second lens ( 32 ) into the lens volume (V 2 ) of the second lens ( 32 ) or from the lens volume (V 2 ) of the second lens ( 32 ) into the second reservoir volume (R 22 ) of the second lens ( 32 ) so as to change the curvature of said area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ); and/or wherein the actuator ( 113 ) of the third lens ( 33 ) is further configured to act on the elastically deformable second wall member ( 43 b ) of the container ( 43 ) of the third lens ( 33 ) to pump fluid (F″) from the second reservoir volume (R 32 ) of the third lens ( 33 ) into the lens volume (V 3 ) of the third lens ( 33 ) or from the lens volume (V 3 ) of the third lens ( 33 ) into the second reservoir volume (R 32 ) of the third lens ( 33 ) so as to change the curvature of said area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) and therewith the focal length of the third lens ( 33 ).

29 . Optical zoom device according to claim 14 , characterized in that the first lens ( 31 ) comprises an actuator ( 111 ) that is configured to act on the elastically deformable first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ) to pump fluid (F) from the first reservoir volume (R 1 ) of the first lens ( 31 ) into the first lens volume part (V 11 ) of the first lens ( 31 ) or from the first lens volume part (V 11 ) of the first lens ( 31 ) into the first reservoir volume (R 1 ) of the first lens ( 31 ) so as to change the curvature of said area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ); and/or wherein the second lens ( 32 ) comprises an actuator ( 112 ) that is configured to act on the elastically deformable first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ) to pump fluid (F′) from the first reservoir volume (R 2 ) of the second lens ( 32 ) into the first lens volume part (V 21 ) of the second lens ( 32 ) or from the first lens volume part (V 21 ) of the second lens ( 32 ) into the first reservoir volume (R 2 ) of the second lens ( 32 ) so as to change the curvature of said area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ); and/or wherein the third lens ( 33 ) comprises an actuator ( 113 ) that is configured to act on the elastically deformable first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ) to pump fluid (F″) from the first reservoir volume (R 3 ) of the third lens ( 33 ) into the first lens volume part (V 31 ) of the third lens ( 33 ) or from the first lens volume part (V 31 ) of the third lens ( 33 ) into the first reservoir volume (R 3 ) of the third lens ( 33 ) so as to change the curvature of said area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) and therewith the focal length of the third lens ( 33 ).

30 . Optical zoom device according to claim 14 , characterized in that the actuator ( 111 ) of the first lens ( 31 ) is further configured to act on the elastically deformable second wall member ( 41 b ) of the container ( 41 ) of the first lens ( 31 ) to pump fluid (F) from the second reservoir volume (R 12 ) of the first lens ( 31 ) into the second lens volume part (V 12 ) of the first lens ( 31 ) or from the second lens volume part (V 12 ) of the first lens ( 31 ) into the second reservoir volume (R 12 ) of the first lens ( 31 ) so as to change the curvature of said area ( 61 b ) of the further membrane ( 21 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ); and/or the actuator ( 112 ) of the second lens ( 32 ) is further configured to act on the elastically deformable second wall member ( 42 b ) of the container ( 42 ) of the second lens ( 32 ) to pump fluid (F′) from the second reservoir volume (R 22 ) of the second lens ( 32 ) into the second lens volume part (V 22 ) of the second lens ( 32 ) or from the second lens volume part (V 22 ) of the second lens ( 32 ) into the second reservoir volume (R 22 ) of the second lens ( 32 ) so as to change the curvature of said area ( 62 b ) of the further membrane ( 22 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ); and/or the actuator ( 113 ) of the third lens ( 33 ) is further configured to act on the elastically deformable second wall member ( 43 b ) of the container ( 43 ) of the third lens ( 33 ) to pump fluid (F″) from the second reservoir volume (R 32 ) of the third lens ( 33 ) into the second lens volume part (V 32 ) of the third lens ( 33 ) or from the second lens volume part (V 32 ) of the third lens ( 33 ) into the second reservoir volume (R 32 ) of the third lens ( 33 ) so as to change the curvature of said area ( 63 b ) of the further membrane ( 23 ) of the third lens ( 33 ) and therewith the focal length of the third lens ( 33 ).

31 . Optical zoom device according to claim 27 , characterized in that the actuator ( 111 ) of the first lens ( 31 ) comprises a piston structure ( 201 ) configured to push against or to pull on the elastically deformable first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ), and/or to push against or to pull on the elastically deformable second wall member ( 41 b ) of the container ( 41 ) of the first lens ( 31 ); and/or wherein the actuator ( 112 ) of the second lens ( 32 ) comprises a piston structure ( 202 ) configured to push against or to pull on the elastically deformable first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ), and/or to push against or to pull on the elastically deformable second wall member ( 42 b ) of the container ( 42 ) of the second lens ( 32 ); and/or wherein the actuator ( 113 ) of the third lens ( 33 ) comprises a piston structure ( 203 ) configured to push against or to pull on the elastically deformable first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ), and/or to push against or to pull on the elastically deformable second wall member ( 43 b ) of the container ( 43 ) of the third lens ( 33 ).

32 . Optical zoom device according to claim 31 , characterized in that the actuator ( 111 ) of the first lens ( 31 ) comprises an electrically conducting coil ( 211 ) that is connected to the piston structure ( 201 ) of the actuator ( 111 ) of the first lens ( 31 ) and is configured to interact with a magnet ( 221 ) of the actuator ( 111 ) of the first lens ( 31 ) so as to move the piston structure ( 201 ) of the actuator ( 111 ) of the first lens ( 31 ); and/or wherein the actuator ( 112 ) of the second lens ( 32 ) comprises an electrically conducting coil ( 212 ) that is connected to the piston structure ( 202 ) of the actuator ( 112 ) of the second lens ( 32 ) and is configured to interact with a magnet ( 222 ) of the actuator ( 112 ) of the second lens ( 32 ) so as to move the piston structure ( 202 ) of the actuator ( 112 ) of the second lens ( 32 ); and/or wherein the actuator ( 113 ) of the third lens ( 33 ) comprises an electrically conducting coil ( 213 ) that is connected to the piston structure ( 203 ) of the actuator ( 113 ) of the third lens ( 33 ) and is configured to interact with a magnet ( 223 ) of the actuator ( 113 ) of the third lens ( 33 ) so as to move the piston structure ( 203 ) of the actuator ( 113 ) of the third lens ( 33 ).

33 . Optical zoom device according to claim 31 , characterized in that the actuator ( 111 ) of the first lens ( 31 ) comprises a magnet ( 221 ) that is connected to the piston structure ( 201 ) of the actuator ( 111 ) of the first lens ( 31 ) and is configured to interact with an electrically conducting coil ( 211 ) of the actuator ( 111 ) of the first lens ( 31 ) so as to move the piston structure ( 201 ) of the actuator ( 111 ) of the first lens ( 31 ); and/or wherein the actuator ( 112 ) of the second lens ( 32 ) comprises a magnet ( 222 ) that is connected to the piston structure ( 202 ) of the actuator ( 112 ) of the second lens ( 32 ) and is configured to interact with an electrically conducting coil ( 212 ) of the actuator ( 112 ) of the second lens ( 32 ) so as to move the piston structure ( 202 ) of the actuator ( 112 ) of the second lens ( 32 ); and/or wherein the actuator ( 113 ) of the third lens ( 33 ) comprises a magnet ( 223 ) that is connected to the piston structure ( 203 ) of the actuator ( 113 ) of the third lens ( 33 ) and is configured to interact with an electrically conducting coil ( 213 ) of the actuator ( 113 ) of the third lens ( 33 ) so as to move the piston structure ( 203 ) of the actuator ( 113 ) of the third lens ( 33 ).

34 . Optical zoom device according to claim 14 , characterized in that the at least one first reservoir (R 1 ) of the container ( 41 ) of the first lens ( 31 ) is filled such with said fluid (F) that the elastically deformable first wall member ( 41 a ) of the container ( 41 ) of the first lens ( 31 ) comprises a convex bulge; and/or wherein the at least one first reservoir (R 2 ) of the container ( 42 ) of the second lens ( 32 ) is filled such with said fluid (F′) that the elastically deformable first wall member ( 42 a ) of the container ( 42 ) of the second lens ( 32 ) comprises a convex bulge; and/or wherein the at least one first reservoir (R 3 ) of the container ( 43 ) of the third lens ( 33 ) is filled such with said fluid (F″) that the elastically deformable first wall member ( 43 a ) of the container ( 43 ) of the third lens ( 33 ) comprises a convex bulge.

35 . Optical zoom device according to claim 17 , characterized in that the second reservoir (R 12 ) of the container ( 41 ) of the first lens ( 31 ) is filled such with said fluid (F) that the elastically deformable second wall member ( 41 b ) of the container ( 41 ) of the first lens ( 31 ) comprises a convex bulge; and/or wherein the second reservoir (R 22 ) of the container ( 42 ) of the second lens ( 32 ) is filled such with said fluid (F′) that the elastically deformable second wall member ( 42 b ) of the container ( 42 ) of the second lens ( 32 ) comprises a convex bulge; and/or wherein the second reservoir (R 32 ) of the container ( 43 ) of the third lens ( 33 ) is filled such with said fluid (F″) that the elastically deformable second wall member ( 43 b ) of the container ( 43 ) of the third lens ( 33 ) comprises a convex bulge.

36 . Optical zoom device according to claim 1 , characterized in that, the container ( 41 ) of the first lens ( 31 ) encloses a lens volume (V 1 ) filled with the fluid (F), wherein the container ( 41 ) of the first lens ( 31 ) further comprises a deformable lateral wall ( 121 ) connected to the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ) for adjusting the curvature of the area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ); and/or wherein the container ( 42 ) of the second lens ( 32 ) encloses a lens volume (V 2 ) filled with the fluid (F′), wherein the container ( 42 ) of the second lens ( 32 ) further comprises a deformable lateral wall ( 122 ) connected to the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ) for adjusting the curvature of the area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ); and/or wherein the container ( 43 ) of the third lens ( 33 ) encloses a lens volume (V 3 ) filled with the fluid (F″), wherein the container ( 43 ) of the third lens ( 33 ) further comprises a deformable lateral wall ( 123 ) connected to the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ) for adjusting the curvature of the area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) and therewith the focal length of the third lens ( 33 ).

37 . Optical zoom device according to claim 13 , characterized in that the first lens ( 31 ) comprises an actuator ( 111 ) that is configured to adjust the curvature of said area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ) and therewith the focal length of the first lens ( 31 ), wherein the actuator ( 111 ) of the first lens ( 31 ) is configured to act on the lens shaping element ( 71 ) of the first lens ( 31 ) or on the wall ( 21 ) of the container ( 41 ) of the first lens ( 31 ) to deform the lateral wall ( 121 ) of the container ( 41 ) of the first lens ( 31 ) and adjust the curvature of the area ( 61 a ) of the membrane ( 61 ) of the first lens ( 31 ); and/or wherein the second lens ( 32 ) comprises an actuator ( 112 ) that is configured to adjust the curvature of said area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ) and therewith the focal length of the second lens ( 32 ), wherein the actuator ( 112 ) of the second lens ( 32 ) is configured to act on the lens shaping element ( 72 ) of the second lens ( 32 ) or on the wall ( 22 ) of the container ( 42 ) of the second lens ( 32 ) to deform the lateral wall ( 122 ) of the container ( 42 ) of the second lens ( 32 ) and adjust the curvature of the area ( 62 a ) of the membrane ( 62 ) of the second lens ( 32 ); and/or wherein the third lens ( 33 ) comprises an actuator ( 113 ) that is configured to adjust the curvature of said area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ) and therewith the focal length of the second lens ( 33 ), wherein the actuator ( 113 ) of the third lens ( 33 ) is configured to act on the lens shaping element ( 73 ) of the third lens ( 33 ) or on the wall ( 23 ) of the container ( 43 ) of the third lens ( 33 ) to deform the lateral wall ( 123 ) of the container ( 43 ) of the third lens ( 33 ) and adjust the curvature of the area ( 63 a ) of the membrane ( 63 ) of the third lens ( 33 ).

38 . Optical zoom device according to claim 1 , characterized in that the light deflecting device ( 70 ) is one of: a folding prism ( 70 ), a mirror ( 70 ), a tiltable mirror ( 70 ).

39 . Optical zoom device according to claim 1 , characterized in that both the first lens ( 31 ) and the second lens ( 32 ) are arranged after the light deflecting device ( 70 ) with respect to the optical path (A).